text: /* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 and
   * only version 2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   */
  
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/device.h>
  #include <linux/platform_device.h>
  #include <linux/io.h>
  #include <linux/err.h>
  #include <linux/slab.h>
  #include <linux/clk.h>
  #include <linux/of.h>
  #include <linux/coresight.h>
  
  #include "coresight-priv.h"
  
  /**
   * struct replicator_drvdata - specifics associated to a replicator component
   * @dev:	the device entity associated with this component
   * @csdev:	component vitals needed by the framework
   */
  struct replicator_drvdata {
  	struct device		*dev;
  	struct coresight_device	*csdev;
  };
  
  static int replicator_enable(struct coresight_device *csdev, int inport,
  			     int outport)
  {
  	struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
  
  	dev_info(drvdata->dev, "REPLICATOR enabled\n");
  	return 0;
  }
  
  static void replicator_disable(struct coresight_device *csdev, int inport,
  			       int outport)
  {
  	struct replicator_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
  
  	dev_info(drvdata->dev, "REPLICATOR disabled\n");
  }
  
  static const struct coresight_ops_link replicator_link_ops = {
  	.enable		= replicator_enable,
  	.disable	= replicator_disable,
  };
  
  static const struct coresight_ops replicator_cs_ops = {
  	.link_ops	= &replicator_link_ops,
  };
  
  static int replicator_probe(struct platform_device *pdev)
  {
  	struct device *dev = &pdev->dev;
  	struct coresight_platform_data *pdata = NULL;
  	struct replicator_drvdata *drvdata;
  	struct coresight_desc *desc;
  	struct device_node *np = pdev->dev.of_node;
  
  	if (np) {
  		pdata = of_get_coresight_platform_data(dev, np);
  		if (IS_ERR(pdata))
  			return PTR_ERR(pdata);
  		pdev->dev.platform_data = pdata;
  	}
  
  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
  	if (!drvdata)
  		return -ENOMEM;
  
  	drvdata->dev = &pdev->dev;
  	platform_set_drvdata(pdev, drvdata);
  
  	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
  	if (!desc)
  		return -ENOMEM;
  
  	desc->type = CORESIGHT_DEV_TYPE_LINK;
  	desc->subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
  	desc->ops = &replicator_cs_ops;
  	desc->pdata = pdev->dev.platform_data;
  	desc->dev = &pdev->dev;
  	drvdata->csdev = coresight_register(desc);
  	if (IS_ERR(drvdata->csdev))
  		return PTR_ERR(drvdata->csdev);
  
  	dev_info(dev, "REPLICATOR initialized\n");
  	return 0;
  }
  
  static int replicator_remove(struct platform_device *pdev)
  {
  	struct replicator_drvdata *drvdata = platform_get_drvdata(pdev);
  
  	coresight_unregister(drvdata->csdev);
  	return 0;
  }
  
  static struct of_device_id replicator_match[] = {
  	{.compatible = "arm,coresight-replicator"},
  	{}
  };
  
  static struct platform_driver replicator_driver = {
  	.probe          = replicator_probe,
  	.remove         = replicator_remove,
  	.driver         = {
  		.name   = "coresight-replicator",
  		.of_match_table = replicator_match,
  	},
  };
  
  static int __init replicator_init(void)
  {
  	return platform_driver_register(&replicator_driver);
  }
  module_init(replicator_init);
  
  static void __exit replicator_exit(void)
  {
  	platform_driver_unregister(&replicator_driver);
  }
  module_exit(replicator_exit);
  
  MODULE_LICENSE("GPL v2");
  MODULE_DESCRIPTION("CoreSight Replicator driver");
  